package com.xiaolun;

/**
 * @Author 硕鼠
 * @Date 2020/6/1 16:48
 * @Version 1.0
 * @Description 文件说明
 */
//缓冲区解决：管程法
public class TestPC {
    public static void main(String[] args) {
        SynContainer container = new SynContainer();
        new Product(container).start();
        new Consumer(container).start();
    }
}

//生产者
class Product extends Thread{
    SynContainer container;
    public Product(SynContainer container){
        this.container = container;
    }

    //生产
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            container.push(new Chicken(i));
            System.out.println("生产了"+i+"只鸡");
        }
    }
}

//消费者
class Consumer extends Thread{
    SynContainer container;
    public Consumer(SynContainer container){
        this.container = container;
    }

    //消费
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println("消费了---->"+container.pop().id+"只鸡");
        }
    }
}

//产品
class Chicken{
    int id; //产品编号

    public Chicken(int id) {
        this.id = id;
    }
}

//缓冲区
class SynContainer{

    //需要一个容器大小
    Chicken[] chickens = new Chicken[10];
    //容器计数器
    int count = 0;

    //生产者放入产品
    public synchronized void push(Chicken chicken){
        //如果容器满了，需要等待消费者消费
        if (count == chickens.length){
            //通知消费者消费，生产者进入等待状态
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        //如果没有满，生产者需要丢入产品
        chickens[count] = chicken;
        count ++;

        //可以通知消费者消费了
        this.notifyAll();
    }

    //消费者消费产品
    public synchronized Chicken pop(){
        //判断能否消费
        if (count == 0){
            //等待消费者生产，消费者进入等待状态
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

        //如果可以消费
        count --;
        Chicken chicken = chickens[count];

        //吃完了，通知生产者生产
        this.notifyAll();
        return chicken;
    }
}